Fishing tool



May 27, 1941 B. J; FHESTERVAN ETAL FISHING TOOL Filed Oct; 19, 1958 MW INVENTOR z 3 I s a M H 9. --5Hm$ nHHHMHHH um. %w

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Patented May 27, 1941 2,243,419

UNITED STATES FISHING TOOL Benjamin J. Festervan and Nathan F. Henderson, Monroe City, Tex.

Application October 19, 1938, Serial No. 235,794 7 Claims. 294-93) The present invention is directed to a fishing recovered, implements provided with such retool for use in the recovery of implements from cesses being shown in our copending applications a bore hole. Ser. Nos. 235,795 and 236,862. It Will be undererate, the fingers must fit into the annular space pressure on the barrel I causes the collars l2 bore hole which space is frequently blocked or mouth of the recess. Upon passing through the distorted in such a way as to render engagement mouth of the recess the collars l2 spring outimpossible. The principal object of the present wardly again, permitting shoulders Hi to engage invention is the provision of a fishing tool which seats provided in the recess for that purpose. will coact with a recess in the instrument to be The implement can then be withdrawn. recovered. In the event that the implement is too tightly A further object of the present invention is stuck to be removed, the shear pin [5 will be the p ovis fl f a fis ing too of t e c a act sheared before suflicient force is applied to indescribed provided with means which make posjure any of the equipment. Upon the shearing sible the recovery of the fishing tool in the event of this pin, collar 5 slides downwardly over seethat the instrument being fished for is too tighttion 4 of the barrel as do cam surfaces 8 over ly wedged to be removed. section 1. When the cam surfaces reach sec- Further objects and advantages of the prestion 9 of smaller diameter, the spring arms colent invention will appear from the following delapse causing collar members t2 to come together tailed description of the accompanying drawing sufficiently to enable their withdrawal from the present invention. of collars l2 in this event so that the spring Referring to the drawing in detail, numeral arms will not be lost.

I designates a barrel which, from one end to the It is apparent that changes can be made in other, has, in sequence, a threaded portion 2 the size, shape and arrangement of parts withadapted to be engaged with tubing or with a suit out departing from the principle upon which the able socket on a wire line, a portion 3 of enpresent invention is based. Such changes are larged diameter adapted to act as a stop, a porcontemplated within the scope of the appended 'on 4 of smaller diameter upon which is adaptclaims in which it is intended to claim the presed to ride a ring 5 carrying the spring arms 6 ent invention as broadly as the prior art perof the fishing device, a portion 1 of still smaller mits.

diameter adapted to provide a bearing surface We claim for cam-like surfaces 8 provided on the inside 40 1. A fishing tool comprising a barrel, spring faces of spring arms 6, a portion 9 of still furarms mounted upon the outside surface of said free end an enlarged collar member 12 having shoulders arranged adjacent the free ends of a shoulder l3 and havinga-bevelled forward end said arms, said free ends being inwardly ta M. The collar 5 is fixed in place on section pered, and means for holding said spring arms 4 of the barrel byashear pin i=5. spaced radially outwardly from said barrel.

The cam-like portions 8 on the spring arms A fishing 001 comprising a barrel having 5 keep the forward ends of these arms spaced adjacent sections of dif erent diameters, spring from section 9 of the barrel and therefore, perarms mounted on said barrel and extending over pered, and protuberances provided on the inner faces of said arms in a position to abut against the section of larger diameter.

3. A fishing arranged on said barrel, collar to said barrel, spring arms carried by said collar and arranged substantially parallel with said barrel, outwardly projecting shoulders arranged adjacent the free ends of said arms, said free ends being inwardly tapered, and means intermediate the ends of said free arms for spacing said arms from said barrel.

4. A fishing tool comprising a barrel, a collar mounted on said barrel, a shear pin connecting said collar to said barrel, spring arms carried by said collar and arranged substantially parallel with said barrel, outwardly projecting shoulders arranged adjacent the free ends of said arms, said free ends being inwardly tapered, means for holding said free arms spaced from said barrel, means for causing said arms to collapse on said barrel when said shear pin is sheared, and a stop carried by said barrel for retaining said arms on said barrel when said pin is sheared.

5. A fishing tool comprising a barrel, a threaded nipple on one end of said barrel, a laterally projecting stop fixed to the other end of said barrel, adjacent sections of said barrel near said latter end being of different diameter, a collar mounted on said barrel between said sections and 30 said threaded nipple, spring arms carried by said collar and arranged to overlay said adjacent sections with their free ends .over the section of smaller diameter, outwardly projecting shoulders arranged adjacent the free ends of said arms, said free ends being inwardly tapered, cam surfaces carried by said arms in a position to coact with the section of larger diameter of said barrel so as to hold the free ends of said arms spaced from the section of said barrel of smaller diameter, and a shear pin connecting said collar to said barrel.

6. A fishing tool comprising a barrel having adjacent sections of different diameters, spring arms mounted on said barrel and extending over said adjacent sections with their free ends over the sections of smaller diameter, a shear pin attached to said barrel adapted to prevent longitudinal movement between said arms and said barrel, outwardly projecting shoulders arranged adjacent the free ends of said arms, said free ends being inwardly tapered, and protuberances provided on the inner faces of said arms in a position to abut against the section of larger diameter.

'7. A fishing tool comprising a barrel, spring arms biased radially inwardly mounted upon the outside surface of said barrel, a shear pin attached to said barrel adapted to prevent longitudinal movement between said arms and said barrel, outwardly projecting shoulders arranged adjacent the free ends of said arms, said free ends being inwardly tapered, and means for holding said spring arms spaced radially outwardly away from said barrel.

NATHAN F. HENDERSON. BENJAMIN J. FESTERVAN. 

